Elevator signal and control system



March l2, 1940. H. w. WILLIAMS Er AL Filed peg. 7, 1935 ENTRANCE DDWNBARS ENTRANCE Q .Z uP CARS ELEVATOR SIGNAL AND CONTROL SYSTEM [l 3h hHim l1-4.a

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Patented Mn. 12, 1940 UNITED STATES PATENT OFFICE y ELEVATOR. SIGNAL AND-CONTROL SYSTEM of Illinois Application December 7, 1935, Serial No.53,378

15 Claims.

Our invention relates to signal and control systems for elevators andmore particularly to systems of' this character which include meanswhereby intending passengers at the landings may eiect the stopping o1'the cars at such landings.

signal and control system which will promote the answering oi' callsandthe loading and unloading of passengers in the most prompt andefiicient manner.

Another object is to provide an elevator system in which the intendingpassengers may' cause the appropriate car for their intended directionoi' travel to stop without any action on their part beyond selecting theapproach they make to the bank of cars.

Another object is to provide a system in which the approach of anintending passenger through an appropriate entrance or a predeterminedpsition to a bank of elevators at a iioor will not only effect thestopping of the appropriate car for him at that floor -but will alsoinstantly operate a. signal which will indicate to the intendingpassenger the hatchway door at which the car will stop-so that he maywalk directly to that door and be ready to en ter the car upon itsarrival.

Another object is to provide a system in which the appropriation oi astop call by a car for a iloor will prevent any other car from receivingthat call.

Another object is to provide a quota system for elevator groups in whichthe number oi' stop calls each car will receive during its trip will belimited by a predetermined number of intending passengers either at oneiioor or at several iloors.

A further object is to provide an elevator system in which the leadingcar, after receiving stop signals from a predetermined number ofintending passengers on, a trip, will not receive any further stop callson that trip but the next following .car will receive such additionalstop calls as are registered.

A further object is to provide a system which will prevent each of thecars from receiving stop calls for lmore than a predetermined number ofpassengers during an up trip or during a down trip.

It is also an object of our invention to provide a. passenger countingmeans which will count onlythe incoming passengers at each iioor. n

The present invention includes, among other novel ideas, the provisionof a plurality of light- One object of our invention is to provide asensitive cells so arranged and connected that the normal movement ofthe intending passengers at the floors will result in eiecting thestopping of the cars for the appropriate direction for such passengersand at the same time eii'ect the instant operation of the floor lanternsto indicate which car Will stop for the passengers, without thenecessity of the passengers operating any push buttons or switches.

For a better understanding of the invention, reference may be had tolthe accompanying drawings, in which:

Figure 1 is a View in perspective of the entrance to a bank of elevatorcars at a iioor,.and includes a plurality of light-sensitive devices forcontrolling the stopping of the cars and the operation of the floorlanterns in accordance with our invention;

Fig. 2 is a top plan View of the light-sensitive cell arrangement shownin Fig. 1:

Fig. 3 is a representation of a counting device for counting the numberof passengers entering l the entrance to the elevator landing;

Fig. 4 is a diagrammatic representation" of a. plurality of inductorrelays and theirinductor plates associated with each car for eiectingits deceleration and stopping as it approaches a landing;

Fig. 5` is a representation of the contact segments and b rushes on afloor selector for the cars:

Figs. 6, 7 and 8 collectively constitute a diagrammatic representation,in what is known as a straight line circuit, of the signal and controlsystem employed in operating the elevator system serving the floorlanding shown in Fig. 1; and

Figs. 6A, '7A and 8A collectively constitute an explanatory illustration.of the relays embodied in Figs. 6, 'l and 8.

'I'he illustration of the relays in Figs. 6A, 7A

and 8A shows their coils and contact members disposed in horizontalalignment With their position in the straight line circuit of Figs. 6, 7and 8, so that the reader may readily determine the identity of anyrelay, the number and kind o f itsA contact members, and the positionofits coil and its contact members in the straight line circuit.Inasmuch as the relays for car B are the same kind as used for car A,the car i3 relays have not been shown in Figs. 6A, '7A and 8A, therebysaving considerable space in the drawings.

-For convenience in reading the drawings, Fig. 7 should be placed underFig. 6; Fig. 8 under Fig. 7; Fig. 6A beside Fig. 6: H8. 7A beside Fig. 7and under Fig. 6A; and Fig. 8A beside Fig. 8 and un er Fig. 7A.

Refe ng more particularly to the drawings, we have illustrated anelevator system embodying a bank of cars with the wiring diagramdeveloped for two oi' the cars A and B. The cars are disposed forserving five oors or landings, similar to the landing shown in Fig. 1.'I'he cars are suitably suspended by cables and B8 which n pass overhoisting drums 9 and B9 respectively.

The relays for car B are given the same designation as those for car Awith theletter B preilxed thereto. The letters Uv and D indicate theupand the down direction. The preiix numerals indicate the oors. Thesufilx numerals indicate the contact members of the relays. Forinstance, the term B3UR3 indicates the contact members for the thirdiloor in the up direction for' the call registering relay for car B.

Referring to the control system for car A (Fig. 6), the hoisting drum 9is directly coupled to an amature It of a hoisting motor II, the fieldwinding I2 of which is connected for constant voltage energization to asource of supply designated as the supply conductors L-i-I and L-I. Itmay be noted that the supply conductors are extended throughout Figs. 6,Z and 8 as L+! and L-S, and L-- and L-B. These supply conductors aredisposed to be controlled by a pair of line switches I3.

A variable voltage system of control is indicated as provided foroperating the hoisting motor II wherein the amature I0 is connected in aclosed circuit with the armature I4 of a generator I5. The generator isprovided with a separately excited iield winding vI6 and a cumulativeseries ileld winding I'I. A resistor I! is connected in the circuit ofthe separately excited eld winding It for controlling the speed of thegenerator. The armature Il of the generator may be driven byany suitabledriving motor (not shown). .In-

- -l asmuch as driving motors .for motor generator sets of theWard-Leonard type indicated, are old and well-known in the art, nofurther description thereof will be given.

A spring operated brake i controlled by a brake lmagnet I is providedfor applying a braking eiiect to the hoisting drum l when the car isbrought to a stop, the brake magnet 6 being energized.

to release the brake when the car is running and being deenergized toapply the brake when the supply of power to the car is cut oil'.

The direction and speed of the hoisting motor II may be suitablycontrolled by controlling the. direction and the value oi the excitationcurrent supplied to the separately excited ileld winding I0 of thegenerator, I6. y

The direction of the excitation currentfor the field winding II may besuitably vcontrolled by means of an up direction switch U and a down'direction switch-D, while the value of the current supplied to theiield winding may be controlled by meansof a high speed relay V whichcontrols the resistor Il.

The operation of the up direction and the down direction switches Ilandi), as well as the .high

. ,Y speedrelay'V may'be controlled by means of a 70 switch CS in thecar.v This switch is so arranged that, ifthe car attendant moves it fromits center position in a counter-clockwise directon,"the up directionswitchy U will be energized to effect themoving of the car upwardly. Itthe switch is moved lfrom its center position in a clockwise direction,the dcwnnirccncn switch n will be energized to eect the moving of thecar downwardly. Hence, it is seen that the starting of the car in eitherdirection is effected by the car.

attendant operating the switch CS for the direction desired.

The car may be decelerated and stopped level;

with any floor it serves by the attendant center- I ing the car switchas the car arrives at the point The inductor landing system for car Aincludes a decelerating inductor relay E and a stopping inductor relay Ffor causing the car to be automatically decelerat'ed from its high speedand brought to a stop at an exact level with the floor.

The decelerating inductor relay E is mounted on the car A (Fig. 4) inposition to cooperate with an inductor' plate UE for the up direction'and with an inductor plate DE for the down direction. The stoppinginductor relay Fis mounted on the car in position to cooperate withan upinductor plate UF and a down inductor plate DF. -The inductor plates areconstructed-of magnetic material and are mounted in the hatchway inposition to cooperate with and open the contact members of the inductorrelays on the car when the relays are in an energized condition as thecar approaches a stop at any landing.

For simplicity,- only one set of inductor plates for oneiloor has beenshown, but it/will be understoodthat a set similar to that shown may beprovided for each floor served by the car intermediate its upperterminal and its lower terminal. If desired, a set of inductor platescorresponding to the inductor plates UF and UE may be provided for theupper'terminal oor and a set corl responding to inductor plates DE andDF may be provided for the lower terminal iloor.

As shown, each inductor relay is provided with two sets of contactmembers. For an up stop,

the contact members El of the relay E cooperate with the inductor plateUE in decelerating the car and the contact members FI cooperate with theinductor plate UF in stopping the car after it is decelerated. For thedown direction, the contact members Eloi relay E cooperate with theinductor plate DE to decelerate the car and the contact members F2cooperate with the inductor plate DF. in stopping the car.

The contact members just described are so connected with the updirection and the down direction switches and the car control circuitsthat, Vwhen theinductor relays are energized to decelerateanfd stop thecar at a door in the down direction, the contact members E2 will open asthey pass the'inductor plate for that floor and will thereby deceleratethe car and the contact members F2 .will open as they pass the inductorplate DF and thereby stop the car at-the floor. The contact members. Elof relay E and the contact members FI oi' the relay F are opened by theinductor plates UE and UF, respectively, when th stop is to be made inthe up direction.

When the inductor relays are energized to decelerate a car to a stop, itis desired to main tain them in that condition until they operate tobring the car to rest.

A slow-down holding relay G is provided for this purpose.

After the inductor relays are energized for a stop, they will remainenergized until restored, even when their contact members are opened bypassage near the inductor plates. Therefore, an inductor restoring relayM is provided for deenergizing the inductor relays of the car after astop has been made and also for so interlocking them that they can beenergized only while the car is moving.

Centering of the car switch will energize the inductorrelays, so the carattendant may, by centering his car switch effect the stopping of thecar level with the next iloor.

It will be obvious that the inductor plates for each floor must belocated suillciently in advance of that floor to permit slowing down andstopping of the car at that oor. It will also be obvious that the carattendant must center his car switch for a stop at a floor at some pointbefore he arrives at'the inductor plates for that floor. Inasmuch asthese distances will vary in each system in accordance with thecharacteristics of the elevator, no denite distance can be here given,but any elevator engineer fairly well skilled in the art will be able toplace the plates in their correct locations in each installation.

AV door operating relay is provided for effecting the closing of thehatchway door 23 for car A when the car leaves a landing after making astop thereat. The relay 45 is controlled by the car switch CS. Inasmuchas the door operating mechanism to be controlled by the relay 45 is oldand well known in the art, it is not shown in the drawings and nofurther description will be given. a

A plurality of floor lanterns are provided at veach floor to indicate tothe intending passengers at the landings which cars will stop and theirdirection of operation. The up lanterns for car A at the lower terminaland the second, third and fourth oors are indicated respectively as IUL,2UL, 3UL and 4UL. The down lanterns for the upper terminal and thefourth, third and second iloors are indicated as 5DL, 4DL, 3DL and IDL.

As stated above, the car attendant may stop the c ar at any iloordesired by centering the car switch as the car approaches that floor.However, inthe present system it is desired to provide means by whichthe intending passengers at the floor landings can effect the stoppingof the next approaching car for the direction they desire to travel,irrespective of the operations by the car attendants. In practicing ourinvention we effect this desired result in a novel manner by providingmeans whereby the approach of the passengers to the car entrances at alanding through an up entrance will stop the nearest approaching car forthe up direction and through a down direction entrance will stop thenearest approaching car for the down direction. By the term nearestapproaching car we mean that car whose position, direction of operationand dis- .tance from said iloor will permit the car stopping means tostop it at that floor when it arrives .thereat. In other words, it meansthe nearest car for the desired direction which is still capable ofbeing stopped at the floor at which a stop call is registered at thetime the call registered.

In practicing our invention we provide means whereby the approach of theintending passengers at the floor landings will eifect the stopping ofthe cars at such landings without any additional action on the part ofthe passengers i beyond directing their steps through an up entrance, ora down entrance in accordance with the direction they desire to travel.As shown in Fig. 1, (which may be taken as the third floor landing) eachlanding is provided with a plurality of hatchway doors 23, one for eachof the cars. an up entrance 5l)A and a down entrance 5I. An exit 52 isdisposed between the up entrance 5U and the side wall 53 and an exit 54is disposed between the down entrance 5l and the side Wall 55. Theentrances are suitably divided by standards 56', 51 and 58. The downpassengers should pass through the down entrance 5|, the up passengersshould pass through the up entrance 5U and the outgoing passengersshould pass through the exits 52 and 54.

In order that the approach of the passengers through the up entrance orthe down entrance at each landing may effect the stopping of theappropriate car for the corresponding direction, we have provided aplurality of passenger operated controls or light sensitive devicesmounted on the standards 56, 51 and 58. These control devices comprise apair of light-sensitive cells UQ and UT located on the upper part of thestandard 56 and a pair of light-sensitive cells DQ and DT located on theupper part of the standard 58. The cells Ut and DT may be called callpreparing cells and the cells UQ and DQ may be called call operatingcells. A suitable lamp 6D is disposed in the upper portion of thestandard 51 for the purpose of throwing light rays toward thelight-sensitive cells UQ and UT on the up standard 56 and thelight-sensitive cells DQ and DT on the down standard 58. A plurality ofsuitable lenses 6| are disposed adjacent to the lamp 60 for the purposelof concentrating a stream of light rays directly upon each' of thelight-sensitive cells. These light rays are indicated by the numerals62, 63, 64 and 65 (Fig. 2).

'I'he light-sensitive cells are associated with amplifiers and relayslin such manner that a. person going to the elevators and passing throughthe up entrance will intercept first the light rays 63 from the lamp 60to the cell UT and then intercept the light rays 62 from the lamp 6U tothe cell UQ and thereby effect the registration of an up stop call forthe nearest approaching car. The lamp rays and their relay are arrangedin such order that the persons pass--` ing outthrough the up entrance 50will not cause the registration of a stop call. Similarly, if a downpassenger enters the elevator corridor through the down entrance 5 I, hewill first intercept the light rays 65 and then the light rays 64 andthereby effect the registration of a down stop call for the nearestapproaching down car. Also, if the passenger walks out through theentrance 5I, the arrangement of the light ray cells and their associatedrelays are such that no down call will be registered.

I'he lower portion of Fig. 8 of the drawings represents the circuits forthe lamp 60, the light sensitive` cells, and their associated amplifiersand relays. The amplifiers associated with these relays are respectivelyindicated by the numerals 10, 1I, 12 and 13. The relays associated withthe up light-sensitive cells UT and UQ are respectively a call preparingrelay 3UW, a call operating relay JUX and a c'all preventing relay 8UY.The relays associated with the down cells DT and DQ are a call preparingrelay SDW, a call oper- The entranceto the landing includes f It is to-be'understood that although any suitable system of light-sensitivedevices may be utilized in our present invention, the arrangementindicated in' the drawings is believed to be preferable and to embodycertain novel features as to the provision of the relays and theirconnections with the cells so that the system will respondA only to themovement of intending passengers through the entrances toward theelevators and will not respond to the movements of passengers awayfrom'the elevators. It is also to be understood that the light-sensitivesystem shown in the lower portion of Fig. 8 is for the third iloor only,and that a similar system is provided for each of the 'otherintermediate iloox's. Ii' desired,

a pair of light-sensitive cells DI' and DQ may be provided for the upperterminal and a pair of light-sensitive cells UT and UQ may be providedfor the lower terminal.

'Ihe means for registering stop calls for car A includes a plurality ofcall -registering relays,

. call to be cancelled and its call registering relay to be restored toits normal condition. The cancellation coils are indicated at IUC, 2UC,3UC and UC for the up direction, and as SDC, IDC, BDC and IDC for thedown direction. ',I'he relays enumerated are for car A, and it is to beunderstood that each car lis provided with its own call registeringrelays.

In order that -the call registering relays may be effective to stop thecar, a stopping `relay S is providedl for energization by the joint.action of the call registering relay lfor a door and the approach o! thecar within a predetermined distance loi' that oor. 'Ihe stopping relayfor car A is indicated by the reference S and'when it is energized itcloses a circuit for energizing the inductor relays E and Fto eifect thestoDPinS of the car in the. e manner v as they may be energizedby theycentering of the car switch.

The relay S may also be called a means functionally relatedto thestopping of the car because it Vmay be used to operate a signal device|03` vin the car to indicate to the car attendant that he shouldimmediately center his car switch for a stop at the next floor'at whichthe car can In the present system it is desired to have the floorlanterns light to indicate which car will stop at a landing as soon as astop call at that landing is registered by the approach of arr-intendingpassenger to the elevator doors, so that the passenger will knowimmediately which car will stop ,for him and keep on walking toward.completeround trip Vshaft travel of all cars into as many signal zonesasthere are cars operating.

Each call registerl aisance.

4Ihey'assign one zone to each car. That acne is the zone in advance ofthat cars motion up to the next car in front of it. The zone i'or eachcar is elastic 'and keeps moving along with the car, its length beingdetermined by the position of the car itself and by the position of thenext car ahead. 'I'he zone relays are operated by the vcars inaccordance with their position. For ear A, the zone circuit controlledby the zone relays is designated as 01:l that for car B as B61 (Fig.'1).

After a stop call is registered on a call registering relay of a car, itis desirable to prevent any other car from picking up the sameregistered call. A plurality of preventing relays are provided for thispurpose. They make the system selective and keep more than one car fromgetting a call. The preventing relays are common to all cars and aredesignated IUP, 2U?, 3UP and IUP for the up direction, and SDP. lDP,3D?, and 2DP for the down direction.

In the operation of elevators, it is desirable to prevent overcrowdingof the cars. Therefore,

we have provided a counting means or relay re- A sponsive to theregistration of stop calls and to the passage of intending passengersthrough the up and the down approach entrances leading to the cars ateach oor for limiting the number of stop calls registered for any carduring one trip between terminals in accordance with a predeterminednumber oi' passengers. This means comprises a counting device 1I, asshown in Fig. 3. The counting device is so connected with the Acontrolsystem that when a predetermined number of intending passengers havecaused it to be operated, it disconnects the car with which itisassociated from the zoning system and from receiving any fu'rther stopcalls from the passengers until the car reaches its terminal and resetsthe counting device for the next trip. An up counting relay for up tripsand a down counting relay for down trips are proa cam 19 on a shaft 80operated by the ratchet wheel, and two pairs of contact members- UHI andUH! disposed to be opened bythe cam member when it reaches apredetermined position. The pawl .1i moves the ratchet wheel andthe camcme step `forward each time it is operated by an impulse of: the coil UHresponsive to the entry of one person through an entrance correspondingto the direction of the counting relay. A

lug 8l prevents the cam 19 from going beyond the point at which it opensthe contact members. Usually each counting relay is set-or adjusted fora lessnumber of passengers than its car will hold. For instance, if acar will hold twelve passengers, `the device maybe set for ten, so thatextra passengers at the oors may be accommodated. A restoring coil UK isprovided for restoring the coimting device to its normal condition whenthe car reaches either terminal.' The coil UK is energized temporarily'by a limit switch UL operated by the arrival of the car at theupperfterminal, and,` when energized, withdraws aV pawl |01which-permits the cam 19 to return to its starting position under theaction of a biasing spring .83 and 'be ready for counting the intendingpassengers on the next uptrip of car A. Inasmuch as the countingmechanism 15 included in the counting relay UH is the same in eachcounting relay, only that for relay UH has been shown in detail (Fig.3).

When the cam moves forward a predetermined number of steps, say ten, itopens the contact members UHI and UH2 to prevent any additionalpassengers registering up calls for car A on that trip. A set screw 82is provided for so-adjusting the cam that it will require a more or lessnumber of passengers to move it to the predetermined point at which itwill open the contact members UHI and UH2.

In order that the various control circuits for the iioor lanterns,relays, etc., may be connected in accordance with the position of thecars with respect to the iioors they serve, car A is provided with adoor selector SE with its contact segments and brushes arranged, asshown in Fig. 5. Inasmuch as floor selectors are old and well known inthe art, it Ais not deemed necessary to show or describe them in detailin this application. However, the outlined plan shown in Fig. 5 willindicate clearly the number of contact segments and contact brushesnecessary in the floor selector for car A. Car B will also be providedwith a similar iioor selector.

The iioor selector for car A is provided with a set of up contactsegments and a set of down .contact segments, arranged according to thefloors, and disposed to be engaged by cooperating up brushes 30 to 33,inclusive, and down brushes 40 to 43, inclusive. upon and insulated froma movable arm SM. The movable arm will be operated in accordance withmovements of the car by means of a screw shaft 85 which may be driven bysome part of the operating mechanism (not shown) of that car. Thefrictional engagement between the arm SM and its operating screw shaft85 will cause the arm to bear upon the up contact segments when the caris travelling upwardly and upon the "down contact segments when the caris travelling downwardly, it' being understood that the arm will tiltfrom one position to the other when the direction of operation of thecar is reversed. For a more complete detailed description of the type offloor selector employed, reference may be had to the Smalley and ReinersPatent No'. 634,-

220, granted October 3, 1899.

The group of up contact segments designated as a under the brush 30completes circuits for energizing the stopping relay to eiect thestopping of the car when a stop call has been registered and the car isapproaching within slowdown distance of the door from which the call isregistered.

The group. of up contact segments designated as b under the brush 3| aredisposed to energize the cancellation coils on the call registeringrelays when the' car makes a stop at a floor in answer to a registeredcall.

The group of up contact segments designated as c under the up brush 32are provided for energizing the' zone relays in accordance with theposition of car A. The brush 32 should be large enough to bridge thecontactr segments when passing from one to another to maintain thepassing zone relay energized until the approaching zone relay isenergized. l

The group of up contact segments designated as d under the contact brush33 are provided for feeding and energizing the zone circuits defined bythe operation of the zone relays. The brush 'd should be large enough tobridge the contact segments when passing from one to another. Thebrushes 32 and` 33 should also be spring The brushes are mounted'mounted and so adjusted that the brush on one side will engage itscontact segments before the brush on the other side disengages when theselector arm tilts from theY up to the down side or from the down to theup side.

. The contact segments on the down side of the iioor selector areengaged by the down brushes I to 43, inclusive,` when the car isdescending and correspond to the contact segments just described for theup direction, those marked e being the down stopping segments; ,f thedown call cancellation segments; g the down zone relay segments; and hthe down zone feed segments.

Car B is provided with a similar oor selector which is not shown in thedrawings, except that the contact segments and brushes are indicated inthe diagrammatic representation of the control circuits in Figs. 6, 7and 8.

inasmuch as the control system for car B is similar to that justdescribed for car A, a detailed description thereof will not be given.

vThe invention may be best understood from an assumed operation of theapparatus shown in the drawings.

It Will be assumed that car A is standing at the second floor on an uptrip, that car B is standing at the fourth iioor on a down trip, andthat the line switches i3 (Fig. 6) are closed to prepare the controlsystems of both cars for operation.

It will also be assumed that the counting devices are adjusted toprevent the registration of calls on a particular car during any onetrip after ten passengers have entered the landings during that trip forthe direction of that trip.

inasmuch as car A is at the second iloor on an.

up trip, its down iioor selector brush 32 is disposed on the contactsegment 2c (see upper portion of Fig. 8) thereby energizing the zonerelay 2UZ by a circuit extending from the supply conductor L+ throughthe contact members UH2, brush 32, contactl segment 2c, and coil 2UZ tothe supply conductor L-5. At the same time, the down brush B42 of car Bis disposed on the contact segment 134g thereby energizing the downdirection zone relay dDZ. The energized zone relay 2UZ opens its contactmembers 2UZI and 2UZ2 and the energized zone relay 4DZ opens its contactmembers 4DZI and 4DZ2. The opened contact members 2UZI and 4DZI aredisposed in the zone circuit 61 of car A and therefore divide thatcircuit into two portions, one portion being `a signal zone for car Aand the other portion being dead. The signal portion includes the closedvcontact members 3UZI, QUZI and SDZI and is rendered alive by theengagement of brush V33 with the zone feed contact segment 2d sothatstop calls at the floors included in this circuit may be registered forcar A. inasmuch as the other portion of the zone circuit 61 is cut oirby the open contact members 2UZI and 4DZI, that portion is dead and nocalls can be registered through it.

The opening of theA contact members 2UZ2 and 4DZ2 in the zone circuitB61 of car B divides that circuit into an energized portion and adeene'rgized portion. The energized portion includes the closed contactmembers 3DZ2, 2DZ2 and |UZ2 and is rendered alive by the down zone feedbrush B43 being disposed on the contact segment B4h so that any stopcall at the iioors included in this live section may be registered forcar B. The

signal zones for the cars are now defined by the zone relays so thateach car will receive stop calls for only its own signal zone withoutaffecting the other car in any way.

It will be assumed now that an intending up direction passenger entersthe up gate SII at the third iloor. The passenger in walking throughthis up entrance intercepts first the light rays 63 and next the lightrays 62. As shown in the lower portion of Fig. 8, the interception ofthe light rays 63 extending from the lamp 60 to the light sensitive cellUT aiects its amplifier 10 to cause operation of theup call preparingrelay 3UW by a circuit extending from the winding 83 of the transformerTR through conductor 94, the coil JUW, contact members 3UYI,the,amplitler l0 and conductor 95 to the transformer winding 83.

' The energized relay 3UW closes its contact memlay IUX for operation.As the passenger continued through the entrance and interceptedthelightray 62, he caused the light sensitive cell UQ to soaffect theampliner 1l that the call operating relay 3UX is energized by a circuitextending from the transformer winding 83 through conductors 94 and 96,the contact members 3UW5, the coil 3UX, amplifier 'H and conductor 85 tothe transformer windingl 93. The energized call operating relay 3UXcloses its contact members 3UXI, 3UX2, 3UX3 and 3UX4. The closing of thecontact members 3UX3 energizes the up Acall registering relay 3UR forcar A at the third iloor by a circuit extending from the supplyconductor L+3 through the contact members IUW! and 3UX3, the coil 3UR,the contact members SUPI, junction point 91, the contact members SUZI,junction point 98, contact segment 2d and up zone eeding brush 33 andthe contact members UI-II to the supply conductor L-3. The energizedrelay SUR closes its contact members IURI, 3UR2, 3UR3, 3UR4 and 3'UR5.'I'he closing of the contact members 3UR4 establishes a self-holdingcircuit for the relay 3UR and the up stop call registered by the uppassenger ai the third floor will now remain registered until it isanswered by car Avstopping at that floor in the up direction andenergizing the cancellation coil SUC. The closing of the contact members3URI connects the stopping contact segment 3a of car A to a source ofsupply represented by the supply conductor L-L Inasmuch as the callregistering relay SUR has been operated to energize the contact segment3a, the

lighting of this lamp is enected immediately with the registration ofthe .up stop call at the third f floor and therefore the passenger isimmediately informed as to which car will-stop-for-him so that he may atonce. proceed to the hatchwaydoorcorrespondingtheretoandbereculytoboardl aisance the car when itarrives' and stops for him. The lamp remains lighted until the call iscancelled.

The closing of the contact members SURE (Fig. 8) energizes thepreventing relay IUP by a circuit extending from v the supply conductorL+8 through the contact members SURI and the coil 3UP to the supplyconductor L-S.' The `energized relay SUP opens its contact members SUPIand IUPZ. e opening of the contact members 3UP2 (Fig. will prevent theregistration of a stop call on the registering relayBlUR i'or car B atthe third i'loor in the event that car B passes car A and therebyoperates the zone relays toplace that iloor in the signal zone of car Binstead of car A. The opening of the contact members 3UPI in the circuitof the registering "relayl'BUR has no efiectv on that relay at thepresent time because it is now-provided with the holding cicuitextending through the contactv members 3UR4 and IUR3.

Therefore it will, be apparent that when a passenger walks through thecorrect entrance toward the elevator, his action registers a stop callfor his car for that floor and lights the correct floor lantern to tellhim at which door his-car will stop, so that he may continue toward itand be ready to get on as soon as it arrives.

If no other passengers desire to ride at this time, the car will stop,take on its passenger andl leave in usual order. In other words, it isnot necessary to have more than onelintending Dassenger tocause a car tomake a stop.

As stated before-however, it is desirable to pre vent a car fromreceiving 'stop calls for too many passengers, that is, each car shouldhave a quota and not* have to carry over a selectednumber ci passengersduring each trip. For this reason. the system is provided with thecounting relays and the call registering relay .closed its contactmeriibers SUR! when the call was registered on f The closing of thecontact members :UR: (Fig. 6) energizes the up counting coil UH of car Aby a circuit extending from the supply conductor L+I through contactmembers SURI, IU'WI and IUXI and the coil UH to the supply conductorL-I. As shown in Fig. 3, and as previously described, the energizationof the counting coil UH causes it to pull upward on the counting pawl 16which thereupon rotates the counting ratchet 11 to move the cam 18 onestep (corresponding to one passenger) toward opening the contact membersUHI and UHZ. The counting coil UH is energized onlyan instant and thendrops its core downwardly but the latchill attached to the core of therestoring coil UK engages the ratchet 'I1 and holds it in the positionto which it has been moved by the pawl 1I. By this operation of thecounting device, it is seen that the passage of an intending uppassenger first registers an up stop call on the registering relay lURand then actuates the counting relay UHl to move its cam Il one step,representing the count of one er for car A. The counting device of car Bis not affected because the -call is not registered on the registeringrelay o! car B and consequently the contact members BSUR! are open inthe circuit of the counting coil BUH of car B.

As long as the stop call remainsregistered onA the third noor for car A,the contact members 3DR! in the circuit of up counting coil UH willremain closed and therefore the coil will be actuated again each timeanother er walks through the up entrance at'the third hoor. For

instanoaitwillbeaswmedthataseocndi tending passenger passes through theup passageway i0 at the third floor for the purpose of making an uptrip. This second passenger nrst interceptsthe light rays 63 and thenthe light rays 62. The interception of the light rays 63 energizes therelay 3UW and the interception of' the light rays 62 again energizes therelay 3UX as previously described. The energization of these two relaysagain closes their contact members 3UWI and 3UXI thereby againenergizing the up counting relay UH (Fig 6) which raises the pawl 16thereby moving the ratchet wheel 'I7 and associated cam 19 a second steptoward opening the contact members UHI and UH2. By this it is seen howthe counting relay UH is operated, by intending passengers passingthrough the entrance to the cars, in such manner that each passenger forthe up direction is counted on the counting device by moving the cam onestep forward. That is, the cam moves a step forward for each passenger.

It will be assumed now that the quota for car A has been set at tenpassengers and that twelve more passengers pass through the up entrance50 for an up trip. As they pass through, they intercept the light raysand eii'ect the operation of the counting relay UH, as previouslydescribed,

`up until the time the tenth passenger passes through. At this point,the cam 'I9 has been moved a sunicient number of steps to open thecontact members UHI and UHZ to prevent the registration of any more upstop calls for car A While it is on its present up trip.

I'he opening of the contact members UHI disconnects the up zone feedingbrush 33 of car A from the supply circuit L-3 and, therefore, no more upstop calls for car A can be registered by intending passengers duringthe present up trip of car A, because no energy will now iiow throughthe call registering relays of car A even if the contact membersindicated by UW and UX therein are closed. At the same time, the openingof the contact members UH! disconnects the car A from the zone circuitoperation so that car A will not now operate to include itself in thesignal zone circuits.

It will be assumed now that an intending up passenger at the fourthfloor passes through the up entrance 50 at that floor and into theelevator corridor for the purpose o f making an up trip.

As this passenger moves through the light rays 63 and 62 at the fourthiioor, he operates the call preparing relay 4UW and the call operatingrelay UX for the fourth floor in the same manner as the correspondingrelays 30W and 3UX were operated for the third oor when the uppassengers entered the third iioor corridor.

The energized relay 4UW closes its contact and opens its contact members4UW6. The closing of the contact members IUWS and 4UW4 prepare. the callregistering relays UR and B4UR on cars A and B for operation. Theclosing of the contact members UWI and 4UW2 prepare the call countingdevices of cars A and B for operation. The closing of the contactmembers IUWS prevents operation of the relay 4UY. The opening of thecontact members UWG prepares the relay UX for operation.

The energized relay 4UX.closes its contact memberslUXI, 4UX2, 4UX3 and4UX4. The closing of thecontact members IUX3 in the circuit for the callregistering relay UR of car A does not energize that relay to register acall thereon because of the open contact members UHI in the isteringrelay for car A in that circuit. 4the closing of the contact membersLUX@ in the circuit to brush 33. However, the closing of the contactmembers 4UX4 completes a. circuit for energizing the call registeringrelay B4UR of car B to register an up stop call at the fourth floor forcar B. This circuit extends from the supply conductor L+4 through thecontact members 4UW4', 4UX4, coil B4UR, the contact members 4UP2 to zonecircuit B61, and thence through the Contact members duzz, 3Uz2, 2Uz2,|Uzz,

2DZ2 and 3DZ2, contact segment Blh, brush B43 and the contact membersBDHI to supply conductor L-l. This circuit is now possible because theopen contact members UH2 for car A have deenergized the zone relay 2UZand consequently opened its contact members in the zone circuits. By theforegoing, it is seen that the up stop call at the fourth floor is notregistered on car A because that cars quota of passengers has enteredthe corridor at the third floor and has caused the counting relay UH forcar A to so operate as to prevent that car from receiving any furthercalls. The call is registered on car B v becausev that is the next carto follow car A on an up trip.

The energized call registering relay BAUR closes its contact membersB4URI, B4UR2, B4UR3, B4UR4 and B4UR5. The closing of the contact membersB4UR| energizes the stopping contact segment Bda for car B so that whencar A approaches the fourth floor in theup direction,its stoppingrelayBS will be energized to stop it at the fourth floor. The closing of thecontact members B4UR2 prepares the circuit for the up counting coil BUHof car B, The closing of the contact members B4UR3 completes a circuitfor the up direction oor lantern BlUL for car B at the fourth floor totell the intending passenger instantly that car B will stop forhim o nhis up trip so that he can walk directly to the hatchway door for thatcar and be ready when it arrives and stops. The closed contact membersB4UR4 provide a selfholding circuit for the registering relay B4UR. Theclosed contact members B4UR5 energize the up preventing relay IUP toopen its contact members UPI and 4UP2 for the purpose of preventing anyother carfrom taking its registered call away from car B.

Turning now to the operation of the energized call operating relay, wefind that the closing of its contact members UXI in thev circuit of thecounting relay for car A had no effect because of lthe op'en contactmembers 4UR2 of the call regcircuit of the up counting coil BUH for carB completes a circuit for energizing that coil. This circuit extendsfrom the supply conductor L-i-2 through the contact members B4UR2, 4UW2and 4UX2, and the coil BUH to the supply conductor L-Z. 'Ihe energizedcoil BUH operates to rotate the up counting device for car B one steptoward the quota for car B. The foregoing description of theregistration of calls for the cars shows how the quota for car A may belled at one floor and how subsequent up calls while car A is still onits up trip will be registered for the next following car, which, inthis case is car B.

At this point, it will be assumed that the attendant on car A moves thecar switch CS in a counterclockwise direction to start that car upwardlyto the top floor. This action closes the contact members a and e ofswitch CS thereby energizing the door closing relay 45 to effect theclosing of the car gate (not shown) of car A and the hatchway door 2l atthe second floor. .The

However,

' energization of therelay 45 also closes its contact members 45-I inthe circuit to the brush II of car A (Fig. 7) so that the cancellationcoil 2UC of car A for the second oor is energized to cancel any callthat may have been registered on the call registering relay ZUR for thatcar at that iloor.

A further movement of the switch CS closes its contact members a and fthereby energizing the up direction switch U by a circuit extending fromthe supply conductor L+I through conductor 81, the contact members a andf of switch CS, the contact members FI, coils U and M and the door andgate contact members 8l to the supply conductor L-I. y 'I'he energizedrelay M closes its contact members MI to prepare the stopping inductorrelays for operation and opens its contact members M2 (Fig. 7) in thecircuit to brush 4I to prevent the cancellation of any registered callsuntil car A makes its next stop.

The energized up direction switch U closes its contact members UI, U2.U2, U4 and U5. 'I'he closing of the contact members UI energizes thebrake coil 6 (Fig. 6) and releases the brake 5 from the hoisting drum 9.The closing of the contact members U2 and U3 energizes the field windingI6 of the generator I5 by a circuit extending from the supply conductorL+I through the contact members U2, winding I i, the contact members U3and the resistor It to the supply conductor L-I, thereby causing thegenerator I5 to supply sufficient energy to the motor II to operate thehoisting drum 9 in running the car upwardly. The closing of the contactmembers U4 energizes the high speed relay V by a circuit extending fromthe supply conductor L--I through the contact members U4 and EI-and thecoil V to the supply conductor L-I. The energized relay V closes itscontact members VI thereby short circuiting the resistor I0 and causingthe hoisting lmotor II to be operated at high speed. The energized relayV also opens its contact members V2 thereby preventing energization ofthe stopping inductor relay F until after the car has been `deceleraltedto its normal landing speed.

The closing of the contact members U5 provides a self-holding circuitfor the switch U for the purpose of maintaining it in operation untilthe stopping inductor relay has been energized and operated to stop thecar at a landing.

As the car moves toward the third floor, its up lbrush 30 engages theenergized contact segment 3a thereby energizing its stopping relay S tostop the car at the third floor in anwer to the stop call registered atthat floor. 'Ihe circuit for the relay -S extends from the supplyconductor .,L-i-I thereby caused to open its contact members EI todeenergize the high speed relay V. '111e deenergized relay V opens itscontact members VI thereby reinserting the resistor Ii' in the circuitfor the field winding Il to decrease the speed of the hoisting motor IIand the car to landing speed.. The deenergized relay V also closes itscontact members V2 -thereby energiljns the stop- E ping inductor relayF.

u. Asthecarapproaches still normalen!! to the car.

the third iioor, the energized inductorrelay F passes the up conductorplate UF and is thereby operated to open its contact members FI whichdeenergizes the up direction switch U and the inductor restoring relayM. The deenerglzed up direction switch U opens its contact members toapply the brake 5 and stop the motor.

As the car arrives and stops at the third iloor, the attendant centersthe car switch for the purpose of deenergizlng the relay 45 to permitthe opening of the car gate and the corresponding hatchway door. Thedoor is thereupon opened so that the intending passengers may stepaboard As the car. leaves the third oor, the relay 45 is energized toclose the door and, therefore, closes its contact members 45-I whichcompletes va circuit for energizing the cancellation coll SUC of thecall registering relay 2UR thus cancelling the up call registered at thethird floor.

As car A arrives and stops at the top iioor, its limit switch UL isoperated to energize the reset coil DK to withdraw the pawl IDI in thecounting device and thereby permit the cam 1l to return to its normalposition under the biasy ing elfect of the spring I3. The counting relayUH of car A is now reset to start a new quota for car A on its next uptrip.

It will be assumed now that the attendant on car B moves his car switchBCS in a clockwise` direction thereby energizing his down directionswitch BD and causing the car B to move downwardly. It will also beassumed that he stops the car at the lower terminal and starts on an uptrip. As car B approaches within stopping distance of the fourth iloor,its up brush B30 engages the contact segment Bla which was energized bythe registration of the up call at the fourth floor. The engagement ofthe brush Bil and the segment Bla will cause the stopping of the car atthe fourth iloor to take on the waiting .passenger at that oor in thesame manner that car A was stopped at the third iioor. After the'waiting passenger enters the car B, it is moved on up to the upperterminal where its arrlval causes the operation of the up limit switchBUL which energizes the counting cancellation call coll BUK todeenergize and restore the counting coil BUH for car B to its normalcondition for counting the up passengers who register calls for car B onits next up trip.

It will now be assumed that car A is moved down to the fourth iioor.With car B at the top floor and car A on a down trip at the fourthiloor, the zone relays DZ and SDZ are energized v to open their contactmembers so thatthe signal zone for car A extends from the fourth floorto the bottom terminal and up t0 the top terminal while the signal zonefor car B extends only to car A at the fourth iioor ahead of it.

It will be assumed now that an intending down'i passenger at the thirdiloor passes through the "down entrance Il. thereby ilrst interceptingthe light rays II and next the light rays Il for that iioor. 'Iheinterception of the light rays Il causes the light sensitive cell DT. toso atleetl its ampliner I2 as to complete a circuit for energizing thecall preparing relay IDW. The energized relay SDW closes its contactmembers IDWI through SDW! and opens its contact 'Y members IDWI. Theclosing of the contact members #DWI and Dwi prepare vthe down callregistering relaysvof cars A and B at the third r iioor for operation.'Ihe closing of the contact members IDW! prevents energisation ot thecall 'l5 preventing relay SDY. 'Ihe closing of the contact members 3DWIand 3DW2 prepare the counting relays DH of carA and BDH of car B foroperation. 'Ihe opening of the contact members 3DW6 prepare the calloperating relay 3DX for operation. The interception of the light rays 64now aifects the ampliiier I3 to effect the energlzation of the calloperating relay 3DX to close its contact members 3DXI, 3DX2, 3DX3 and3DX4. The closing of the contact members 3DX3 causes the energization ofthe down call registering relay 3DR for car A at the third floor by acircuit extending from the supply conductor L+3 through the contactmembers 3DW3, 3DX3, coil 3DR and contact members 3DPI to the zonecircuit 61 and thence through the contact members 3DZI, the contactsegment 4h, and the contact brush 43 and contact members DHI to thesupply conductor L-IL The energized relay 3DR closes its contactmembers. 'Ihe closing of the contact members 3DR4 establishes aself-holding circuit for the relay SUR and the down stop call by theintending down passenger at the third oor is now registered for car Aand Will now remain registered for that car until it isanswered by thatcar. The closing of the contact members 3DRI connects the stoppingcontact segment 3e of car A to the supply conductor L- I. This energizesthe segment 3e so that the stopping-relay S of car A will be energizedto stop that7car when it arrives within stopping distance of the thirdoor.

The closing of the contact members 3DR3 completes a circuit for lighting,the down iloor lan-A tact members and thereby prevent the registrationof a stop call on the registering relay BSDR for car B at the thirdfloor until the present registered call at that or for car A isanswered.

The closing of the contact members 3DR2 energizes the down counting coilfor relay DH of car A by a circuit extending from the supply conductorL-i-I through the contact members 3DR2, BDWI, and 3DXI and the coil DHto the supply conductor L-I. The energization of the counting coil DHcauses it to operate its counting mechanismV corresponding to a count ofone passenger. It will be assumed that six other down passengers alsostep through the down entrance 5I at. the third oor and thereby operatethe counting relay DH toeiect operation of its counting mechanismaccordingly. This will make a .total of seven persons at' the thirdiloor so actuating the counting mechanism of relay DH as to move its camseven stepstoward the position at which it will open' its cooperatingswitches when its quota of ten has been registered upon it.

It will be assumed now that an intending down passenger passes throughthe down entrance 5| at the second floor and into the elevator corridorfor the purpose of making a. down trip. As this passenger moves throughthe light rays 65 and 64 at the second floor, he operates the callpreparing relay 2DW and the call operating relay 2DX for the secondfloor in the same manner as the corresponding relays 3DW and 3DX for thethird floor were operated when the down passengers entered the landingat the third floor.

The energized relay ZDW closes its contact members 2DW3 and 2DW4 toprepare the call registering relays 2DR and BZDR for cars A and B foroperation. The closing of the contact members 2DWI and 2DW2 prepare thecall counting devices of cars A and B for operation. The opening of thecontact members 2DW6 prepares the relay ZDX for operation.

The energized relay ZDX closes itsl contact members 2DX3 and therebyeiects the eneigization of the down call registering relay 2DR of car Afor the second floor. The closing of the contact members 2DX4 does notaffect the call registering relay for car B because its signal zonecircuit is open. The energized relay 2DR closes its contact members ZDRIto prepare for stopping the car A at the second iioor on its down trip,in a manner similar to that heretofore Idescribed in connection with theother stops.

members 2DR2 will remain closed until the call y is cancelled. In themeantime, it will be assumed that two other down passengers at thesecond floor enter the landing at the IioorA through the gate 5I and`.consequently pass through the light rays S5 and 64 and actuate thecounting relay DH to move its counting mechanism 2 more steps, making atotal of three intending doWn passengers at the second floor.

rhe counting relay DH is adjusted for cutting car A out of any morecalls on its down trip after ten intending down passengers have passedthrough the down entrances and have eiected the registration of one ormore calls for car A. Inasmuch as seven passengers passed through thedown entrance for the third iioor and were counted by the counting relayDH and now three more `passengers have passed through the down entrance5| at the second iloor and have thereby operated the counting relay DHto count three more persons, that relay has counted a total of tenpersons. As stated above, the counting relay DH has been so adjustedthat its limit for car A is ten persons. It has now reached the limit often persons and therefore operates to open its contact members DHI andDHZ. The opening of the contact membersDHI disconnects the down brush 43for car A from its zone circuit 61 and thereby prevents the registrationof any more down calls for car A for the reason that no energy can befed into these relays from the supply conductor L-3. 'I he opening ofthe contact members rDHZ (Fig. 8) disconnects the down brush 42 for carA from the zoning contact segments so that car A cannot, while on thisdown trip, energize any of the zone relays to create a signal zone aheadof itself.

It will be assumed now that an intending passenger `enters the floorlanding at the first floor through the up gate 50 yand thus interceptsthe light rays l63 and 62 for the lower terminal thereby effectingoperation of the corresponding relays IUW and IUX. The operation ofthese relays closes their contact members IUW3 and IUW4 and IUX3 andIUX4 in the circuits of the Acall registering relays for both cars A andB. However, as previously described, the contact members DHI leading tobrush 43 of car A are open and, therefore, the up call registering relay`for the lower floor for car A- cannot be energized even though car A isthe nearest approaching car and the contact members. IUW3 and IUX3 havebeen closed in the circuit of its call registeru ing relay IUR. Inasmuchas car B (now at the top terminal and above vcar A) controls the signalzone circuit ahead of itself past car-A, the closing of the contactmembers IUW4 and lUXl (Fig. 7) energize the up call registering relaysBIUR of car B by a circuit extending from the supply conductor L+4through the contact members IUWl and lUXl, coil BIUR, the contactmembers 2UP2 to zone circuit B61 and thence through the contact membersIUZ2, 2DZ2,1 3DZ2 and 4DZ2, contact segment Bh, brush B43 and thecontact segments BDHl to the supply conductor L-4. 'I'he energized relayBIUR, for car B operates its contact members to light the signal lamp atthe lower terminal for car B and to prepare for stopping that car whenit aproaches within stopping distance of the lower terminal.

By the foregoing operations it will be seen that as soon as the quota often persons for car A was iilled for its down trip, even though seven ofthe persons were at one floor and three of the persons were at anotheriioor, the signal system of car A was so controlled by the countingrelay DH as to prevent car A from receiving any more down calls on thisdown trip. It is also seen that when an additional call by the eleventhperson was registered, it was registered for car B which is the nextapproaching car behind car A.

It will be assumed now that one of the elevator passengers steps oi acar after it stops and mistakenly walks out through the up entrance.'illl at the third iioor instead of out through one of the"exitopenings` at that landing. In walking in and out through the up entrance50, the

passenger first intercepts the light rays 62 from the' lamp 6|! to thelight sensitive cell UQ and then the light rays 63. This interceptioncauses the cell UQ to so control its ampliiier 1I that the callpreventing relay 3UY is energized before the passenger can pass throughthe light rays 63. 'I'he circuit for the relay 3UY extends from thetransformer winding 83 through the conductor 94, the coil 3UY; theclosed contact members 3UW6, the amplifier 1I and conductor 95 to thewinding 93. 'I'he energized relay 3UY immediately opens its contactmembers 3UYI thereby preventing energization of the call preparing relaySUW and consequently preventing the registration of stop calls bypersons walking out through the in entrances 50 marked up or out throughthe in entrances 5I marked downf Hence it is seen that only the passageof passengers inv the correct direction through the call operatingentrances will be eflective to operate the call registering means andthe quota counting relays.

At times it may be desirable to operate the cars under pre-registeredsignals instead of automatically stopping them in response to hallcalls.

, are in their lower positions, the operation of a control or`lightsensitive 'device at a `iloor by an intending passengerwill Vcause thelighting of the signal lamp inthenearest approaching car when it arrivesWithin stopping distance of that oor so that the car attendant mayimmediately center his car switch tothereby energize the inductor relaysand cause the car to decelerate and stop level with that floor in answerto the passengers lstop signal. By the term-nearest approaching car wemean that car whose position, direction of operation and distance fromthe floor will permit the car to stop at that iioor when it arrivesthereat. In other Words, it means the nearest car for the desireddirection which is still capable of being stopped at the floor for whicha stop call is registered at the time of registration.

In view of the assumed operation of the system, it will be understoodthat we have provided an improved elevator system which may be operatedwith practically no effort on the part of the passerigers, which willprevent the crowding of the cars andwhich will facilitate the answeringof the calls and the loading land the unloading of the passengers moreeiilciently than heretofore.

It will' be seen that we have provided a system which will prevent thegiving of false stopping signals at the various oors; that is, whichwill prevent a car ,from accepting a stop call and giving a stop signalat an additional iioor when it has already accepted hall stop calls forall the passengers it can comfortably carry.

Although we have illustrated and described only one specic embodiment ofour invention, it

is to be understood that many changes therein and modifications thereofmay be made without departing from the spirit and scope of theinvention. n

We claim as our invention:

l. In an elevator system for operating a car serving a plurality offloors, a stopping means for the car, a plurality of standards definingan up' entrance and a down entrance leading to the car at each floor,means responsive to the passage of an intending passenger through the upentrance at a oor for operating the stopping means ity of cars serving aplurality of iloors, a stopping means for each car, a plurality of wallsdisposed to provide an up entrance and a. down entrance leading to allof said cars at each iloor, means responsive to the passage of anintending passenger through the up entrance at a landing for registeringa stop call for the nearest approaching car for theV up direction, meansresponsive to the registration of said up call for operatingthe stoppingmeans of the car for which the call has been registered when it arrivesat said floor, and means responsive to the passage oi' a passenger'through the down entrance at a floor for registering a down call forthat floor for the nearest approaching car in the down direction, andmeans responsive to said down registered call for actuating the stoppingmeans of said nearest approaching down car when that car arrives in thedown direction within stopping distance of that floor to stop it at thatiioor.

3. `In an elevator system for operating a plurality of cars past aplurality of fioors,and up control means and a down control means ateach of said oors, a plurality of up call registering devices, one foreach car for each floor, a plurality ot down call registering devices,one for each car for each floor, means responsive to operation of a 7|ing car.

control means at a floor for operating the call registering device ofthe nearest approaching car in the corresponding direction, a meansfunctionally related to the stopping of the car for each car, meansresponsive to an operated call registering device for operating saidfunctionally related means for that car, and quota means responsive tooperation of the contro-l means by a predetermined number of intendingpassengers and to the registration of a call for that car for preventingoperation of additional call registering devices for that car.

4. In an elevator system for operating a plurality of cars past aplurality of floors, an up control me'ans and a down control means ateach of said iloors, a plurality of up call registering devices, one foreach fior,- a plurality of down call registering devices, one for eachcar for each iloor, means responsive to operation of the control meansat a floor forv operating the call registering device of the nearestapproaching car in the corresponding direction, a means functionallyrelated to the stopping of the car for each car, means responsive to anoperated call registering device for a car for operating saidfunctionally related means for that car,

and quota means responsive to operation of the control means by apredetermined number of intending passengers for said nearest'aproachingcar and to the registration of a call for that car for preventingoperation of additional call registering devices for that car and forcausing the control devices operated by additional intending passengersfor said nearest approaching car to' effect the operation of the callregistering devices of the next car following said nearest approach- 5.In an elevator system for operating a plurality of cars serving aplurality of noors, a stopping means for each car, a plurality ofstandards defining an up entrance and a down entrance leading to thecars at each floor, an identifying means for the up entrance, anidentifying means for the down entrance, means responsive to the passageof an intending passenger through the up entrance at a floor foroperating the stopping ping means for each car, a plurality of wallsdisposed to provide an up entrance, a down entrance and an exit forpassengers for said cars` at each floor, an identifying means associatedwith the up entrance, the down entrance and the exit at each floor,means responsive to the passage of an intending passenger through the upentrance at a iloor for registering a stop call for the nearestapproaching car for the up direction, means responsive to said upregistered call for actuating the stopping means of the said nearestapproaching up car when that car arrives in the up direction withinstopping distance of that oor to stop it at that floor, means responsiveto the passage f a passenger through the down .entrance at a floor forregistering a down call for that floor for the nearest approaching carin the down direction, and means responsive to said down registered calli'or actuating the stopping'means of said nearest approaching down carwhen that car arrives in the down direction within stopping distance ofthat floor to stop it at that floor.

7. In an elevator system for operating 'a plurality of cars serving aplurality of floors, a stopping means for each car, a plurality of callregistering devices, one for each 4car for each floor, a plurality ofwalls disposed to provide an up entrance, a down entrance and an exitfor said cars at each floor, means for identifying the up entrance, thedown entrance and the exit at each floor, a plurality of light sensitivedevices one for each up entrance and one for each downentrance for eachof the floors, light-means for illuminating the light sensitive devices,a plurality of call operating relays one for each light sensitive devicedisposed to be operated by operation of that light sensitive device whenan intending passenger passes between that light sensitive device andthe light provided for illuminating it, a plurality of zone definingdevices operated by and in accordance with the position of 'the cars,means responsive to operation of a call registerjing device by. anoperated light sensitive device at a floor and to operation of thezoning devices for operating the call registering device of the nearestapproaching car for the floor of the operated light sensitive device toregister a stop call for that car, and means responsive to theregistration of a stop call upon the cali registering device of that carfor operating its stopping means upon its approach to within apredetermined distance of said floor to stop it at that iioor.

8. In an elevator system for operating a plurality of cars serving aplurality of floors, a plurality of walls disposed to provide an upentrance and a down entrance common to all the cars at each floor,identifying means for the up entrance and the down entrance at eachfloor, a stopping means for each car, a plurality of call preparinglight sensitive devices one for each entrance, a

plurality of call operating light sensitive devices one for eachentrance for each floor, means for illuminating the light sensitivedevices at each floor by approximately parallel rays of light, aplurality of call preparing relays, one for each of the call preparinglight sensitive devices, a plurality of call operating relays one foreach of the call operating light sensitive devices, the call preparingrelay for each light sensitive device being disposed to be operated bythe operation of that light sensitive device in response to the vpassageof an intending passenger through the light rays to that lightsensitivedevice, the call operating relay for each entrance being disposed to beoperated by the operation of the call preparing relay for that entranceand operation of the call operating light sensitive device with which itis associated by the passage of an intending passenger between thesource of light and that light sensitive device, a plurality of callregistering relays, one up and one down for each car for each'floor,means responsive to operation rality of walls disposed to provide an upentrance and a down entrance each common to all the cars at each floor,an identifying means for the up entrance and an identifying means forthe down entrance at each iloor, a stopping means for each car, aplurality of light sensitive devices, one at each entrance at eachfloor, means for illuminating each light sensitive device by light raysat each iioor, a plurality of call registering relays, one for each carforeach floor, means responsivel to the effect on a light sensitivedevice at a door produced by the passage of an intend ing passengerthrough the light rays to that light sensitive device for operating thecall registering relay for that floor for the nearest approaching carfor the direction corresponding to thatlight sensitive device, and meansresponsive to operation of that call registering device for operatingthe stopping means of that nearest aproaching car when it approacheswithin stopping distance of that floor to stop it at that floorD 10. Inan elevator system for operating a pluy rality of cars serving aplurality of floors, a plurality of up call registering devicesfone foreach of said cars for each of said iloors, a plurality of down callregistering devices one for each of said cars for each of said oors, anup passenger 0perative means and a down passenger operative means ateach of said floors, means responsive to operation of a passengeroperative means at a floor and to the position of the cars for operatingthe call registering relay for the direction of the operated passenger.operative means for the nearest approaching car for the directionof.the operated passenger operative means forit'liiatty floory and meansresponsive to operation ofsaid passenger operative means by apredetermined number of intending passengers and to operation of saidoperated call registering relay forfpreventing operation of additionalcall registering devices for said nearest approaching car.

1l. In an elevator system for operating a plurality of cars past aplurality of oors, an up control device and a down control device ateach floor, common to all th'e cars, a plurality of call registeringdevices one for the up and one for the down direction for each car foreach `door, means responsive to operation of a control device at a floorfor operating the call registering device forV the directionof theoperated control device of the nearest approaching car for the directionof the operated control device forthat floor, a stopping means for eachcar, means responsive to the approach of said nearest approaching car tothe :door corresponding to said operated control device and to saidoperated call registering device for operating the stopping means forthat car, and means responsive to operation of said operated controldevice by a predetermined number of passengers for said nearestapproaching car and to operation of said operated car registering devicefor preventing the operation of additional call registering devices forthat car by operation of the control devices at i'loors between that carand the riext car ahead.

l2. In an elevator system for operatinga plurality of cars serving aplurality of floors, an up control device and a down control device ateach floor common to all the cars, a plurality of up call registeringdevices one for each car for each iloor, a plurality of down callregistering devices o ne for each car for each oor, an up counting of'a:control device at a door for operating the call registering device forthe directionof the operated control device for the nearest approachingcar for the direction of the operated control device, means responsiveto the operation of the operated control device and to operation of theoperated call registering device for operating the counting device forthe direction of the operated control device of said nearest approachingcar, and means responsive to operation of said operated counting devicea predetermined number of times for preventing operation of additionalcall registering devices for said nearest approaching Car.

13. In an elevator system for operating a plurality of cars serving aplurality of floors, an up control device and a down control device ateach floor common to all the cars, a plurality of up call registeringdevices, one for each car for each floor, a plurality of down callregistering devices, one for each car for each floor, an up countingdevice and a down counting device for each car, means for providing azone for each of the cars, means responsive to operation of the zoningmeans and to operation of the control device at a floor for operatingthe call registering device for 4the direction of the operated controldevice for the nearest approaching car for that operated control device,means responsive to operation of the operated control device and tooperation of the operated call registering device for operating the-counting device corresponding to the direction of the operated controldevice for said nearest approaching car, means responsive to operation`of the operated counting device a predetermined number of times forpreventing operation of additional call registering devices for saidnearest approaching car and for conditioning the zoning meansto causethe operation of additional control devices of the direction of theoperated control device in the zone of said nearest appreaching car tooperate the call registering device for the direction of the operatedcontrol device of a following car.

14. In an elevator system for a plurality of cars serving a plurality ofiloors, means defining an up entrance and a down entrance leading to thecars at each iloor, a plurality of light sensitive devices, one for eachup entrance and one for each down entrance at each of the floors, lightmeans for illuminating the light sensitive devices, a means functionallyrelated to the stopping of the car for each car, means responsive tooperation of a light sensitive device for an up entrance at a iloor bythe passage of an intending passenger through said up entrance foroperating the means functionally related to the stopping of the nearestapproaching car for the up direction for said floor, and meansresponsive to operation of a light sensitive device for a down entranceat a floor by the passage of an intending passenger through said downentrance for operating the means functionally related to the stopping ofthe nearest approaching car for the down direction for said oor.

15. In an elevator system for a plurality of cars serving a plurality ofiloors, means deilning an up entrance and a down entrance leading to thecars at each floor, a plurality of light sensitive devices, one for eachup entrance and one for means for illuminating the light sensitivedevices, a means functionally related to the stopping of the car foreach car, a signal device for each car for each entrance at each iloor,means responsive to operation of a light sensitive device for '-.eachdown entrance at each of the floors, light 70 an up entrance at a iloorby the passage oi' an the passage of an intending passenger throughintending passenger through said up entrance for said down entrance forimmediately operating immediately operating the up signal device of thethe downsignal device of the lnearest approachnearest approaching carfor the up direction for ing car for the down direction for that oor andthat oor and for operating the means functionfor operating the meansfunctionally related to ally related to the stopping oi' that car whenit the stopping of that car when it arrives within arrives withinstopping distance of that floor, stopping distance of that floor. Y

and means responsive to operation of a light HAROLD W. WILLIAMS.sensitive device for a down entrance at a noor by EDGAR M. BOUTON.

